Lubricator for air-pumps.



W. V. TURNER.

LUBRIGATOR FOR AIR PUMPS.

APPLICATION FILED APE.19, 1911.

nnrrnn same rgajnnr cation.

WALTER v.- TURNER, on nnenwoon rnnivsvtvaiviag'nssrenon TO THE WESTING-. HOUSE AIR BRAKE COMPANY, or PITTSBURGH, PENNSYLVANIA, a oonrona'rron OF PENNSYLVANIA.

LUBRICATOR FOR AIR PUIVIPS.

Specification of Letters Patent.

Patented vNov. 36, 1912.

Application filed April 19, 1911. Serial No. 622,084.

To all whom it may concern:

Be it known that I, VVALTER V. TURNER, a citizen of'the United States, residing at Edgewood, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Lubricators for Air-Pumps, or which the following is a specification. Y

This invention relates to lubricating de vices, and more particularly to a lubricating device for-fluid compressors. Heretofore, with lubricators for feeding oil to the air cylinder of an air compressor, especially where oil is supplied to the cylinder at each stroke of the pump, considerable dilhculty has been experienced in preventing an excessive amount of oil from being supplied.

The principal object of my invention is to provide an improved lubricating device for air pumps which is adapted to feed oil at each stroke of the pump and yet in such small quantity as to prevent an excessive amount of oil from being fed, thus etfecting a considerable saving of oil while at the same time sufficiently lubricating the pump.

,In the accompanying drawing, Figure 1 is a central sectional view of a lubricating device embodying my invention and Fig. 2 a sectional view of an air pump with the lubricator applied thereto.

According to the construction illustrated in the drawing, a suitable casing 1 is provided having an oil chamber '2 adapted to contain a supply of oil or lubricant and depending into said chamber is a plug 3 provided with a passage l. The passage 4: extends upwardly through the plug 3 and connects with a passage 5 located in the wall of the casing 1 and a check valve 10 is mounted in said passage 4 so as to prevent flow through passage at in the direction from the oil chamber 2 to the passage 5 but adapted to permit flow in the opposite direction. Passage 5 also communicates with a chamber 6 in the plug 3 containing a check valve 7 adapted to permit flow from a passage 8, opening into the oil chamber 2, to the passage 5 but preventing flow in the opposite direction. The passage 8 opens into the oil chamber 2 at a point near the top of same so as to be above the surface of the oil contained in the chamber, Passage 5 leads out through a lower threaded projection 9 of the casing 1, so that the lubricator may be screwed intothe casing 13 of an air cylinder 1st of a pump and communication thus established from the air cylinderto said passage, as shown in Fig. 2.

In operation, the oil chamber 2 having been filled about one-half or two-thirds full of oil or lubricant, upon a compression stroke of the pump, air is forced from the air cylinder through passage and. thence, by lifting the check-valve 10 from its seat against spring 12, flows out of passage at into the oil chamber 2. a The air then rises up in bubbles. through the body of oil in said chamber and in so doing becomes charged to a certain extent with oil vapor, so that the air space in the chamber Q'abo-ve the body of oil contains oil charged. air. In a suction stroke of the pump, the pressure of air in chamber 2 causes the check valve 7 to lift from its seat and the oil charged air then flows throughypassage 5 into the air cylinder of the pump. It will now be'evident that the quantity of oil entrained with the air is comparatively small and conse quently only a very little oil is "supplied to the pump on each suction stroke, thus preventing waste of oil and excessive lubrication of the pump.

A screw plug 1.1. may be provided in the casing 1, so that the chamber 2 may be charged with oil through the inlet provided by removing the plug.

Having no. described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A lubricator for air pumps comprising casing having a chamber containing a body of lubricant and means for conducting air from the pump through said lubricant on the compression stroke of the pump and for discharging said air into the pump on the suction stroke of the pump.

2. A lubricator for air pumps comprising a casing having a chamber containing a body of 01]., means ror conducting air compressed by the pump on its compression stroke through the oil to thereby entrainv oil in the air, and means for discharging the oil entrained air into the pump to thereby lubricate the same.

3. The combination with an air pump provided with an air cylinder, of a. lubricator for said pump having a chamber containing a body of oil, a passage communicating with said. air cylinder for discharging fluid compressed by the pump into said oil, and a passage communicating with. said chamber for discharging fluid. pasood through said oil into (he air cylinder of the pump.

4. The ('Oliiiiiiliiionwith unair pump prorided with an ai cylinder, of a inb 'icator for said plump oa'nriprising & (basing having a chamber containing :1 body of oil, :1 passage leading from said c' iinder and having its ouflei, in. one body of oil for discharging air compressed by iii-1': pump on its comprossion stroko through said oil, and having another passage leading from said voi]. chainbar for supplying air pas; :d through the oii. to the air cylinder of the pump,

Toe combinuiion with an air pump provided with an air cyiind r of a iubric; '1. .i for said pump comprising :1 casing having a chamber containing a body 01" oil, a pmsago ieading from said oyiinder and having iis ouflet in the body 01 oil for discharging air compressed by the pump on its compression stroke througi'i said oil, and having another pm leading from said oii ciigrmber for supplying air passed through the oil to the air cylinder of the pump and a check wire in each pnssziga.

(3. The combination with an air pump provided with an air cyiinder, of :1 h'ibl'i0i1t0if for said pump comprising casing i'izrving a :1m1nber containing body of oil, 11 passage ieading from said cylinder and having (:11 t i on "from 11h its outlet in iii: body of oil for disciizirgi air compressed by the pump on its cornmeasion stroke through said oil, and. having an other pus r ding from said oii ohzmiosr for suppiying; air through in oi, to the air @3 11. do: of ihe pump o i suction stroke of the i o, a Ciluii. v re in tho mnipress' in 3915s: v or closing oomnmnia nil chzmiiier toward tho ojir (qviinder, and a check who in the suction for closing coinin-uniczitionfrom the under toward the chamber.

11 The. combination with {in air pump provided wiih an air cyl nder, of a iubricator for said pumpcomprising a osing having 2 chamber cimiaining a body of oil, apossage lending from said cylinder and having its ouiiei: in the body of: oii for discharging air compressed by the "pump on its coinpressioii stroke through said 0i and having another passage ieadingg from. Lid oii chamber for siiippi -11g air passed through die oii to me sir cylinder of the pour on iiie suction stroke oi'tiic pump and min-return check valve in each passage.

Ln testimony "whereof I have hereoniio my hand,

WALTER V, TURI'ER.

Witnessos i A, M. (ELEMENTS? S. W. 

